German Martin Kaymer is aiming to stay as world number one for longer than compatriot Bernhard Langer managed.
Langer was the first man to take the mantle when the official rankings were introduced in 1986.
His performances in his golf clothing 25 years ago helped him maintain the position for three weeks, but Kaymer is already in the second week of his reign.
"It would be nice to be one day longer as number one than Bernhard Langer," he said. "But if it happens it happens and if not that's fine too.
"I really don't care. I've been number one and no-one can ever take it away from me. That was my goal when I started playing golf."
The biggest threat to Kaymer's number one spot is Englishman Lee Westwood, who could overtake him with a strong performance WGC Cadillac Championship.
Langer, 53, won 83 tournaments in his illustrious career, including two Majors.